AC_AutoTune; minor format fixes

libraries/AC_AutoTune/AC_AutoTune.cpp

@@ -357,7 +357,6 @@ void AC_AutoTune::run()
         return;
     }
 
-
     int32_t target_roll_cd, target_pitch_cd, target_yaw_rate_cds;
     get_pilot_desired_rp_yrate_cd(target_roll_cd, target_pitch_cd, target_yaw_rate_cds);
 
@@ -651,7 +650,6 @@ void AC_AutoTune::control_attitude()
         // re-enable rate limits
         attitude_control->use_sqrt_controller(true);
 
-
         // log the latest gains
         if ((tune_type == SP_DOWN) || (tune_type == SP_UP)) {
             switch (axis) {
@@ -679,7 +677,6 @@ void AC_AutoTune::control_attitude()
             }
         }
 
-
         // Check results after mini-step to increase rate D gain
         switch (tune_type) {
         case RD_UP: